I can't imagine having a plastic in them. When you use them for corn or potatoes you wash it first ( do not dry) and wrap each piece in a wet but squeezed out paper towel. And you have a warm damp paper towel to wipe your hands on. LOL

http://www.atimetostitch.com/potato_bags.htm
I found this web site in the topic log. It was mentioned back in '08. This would explain why you have not read about it. I used 100% cotton batting. It is just a small pillow case with an over flap basically. Enjoy. By the way it does work.

Warm and Natural cotton batting and other cotton batting has scrim. Scrim is a very think poly layer and poly is what catches on fire in a high wattage microwave. If you microwave is around 800 watts it think the regular batting is fine. Put a piece of any batting you want to use for the bag in the microwave and test it for the length of baking several potatoes. I wrap my potatoes in a cotton feed sack towel if I use the microwave. Not as pretty but works fine.

I keep hearing that certain plastics aren't good in the microwaves, too. The heat releases chemicals that aren't good for us... poly is a type of plastic I believe....

I think I may just make cotton bags without any batting in them for tater bags :D:D:D

Did you make one and did it work well without the batting. I want to make some but I'm thinking , like you, that I'll leave out the batting.

I am very excited about this batting, (as you can see). Quilters Dream offers a similar cotton batting. As a quilt batting seller, I am more impressed with the Warm Company's decision to produce a better product. I'm sure you'll agree.

Unlike other "100%" cotton batts that have a scrim, Warm Tater
Batting, Quilters Dream Cotton Batting and Bosal Organic
Cotton Batting do not have a scrim.

This is what I do for a living. It is my responsibility to make
sure that any information I write, or give orally is 100% accurate.
Before writing this article, I made sure I checked with the,
"horses mouth", so to speak to make sure what I advise is
truly accurate.

Another good thing to remember!
Warm Tater Cotton Batting is also recyclable and best of all,
Made in the USA!